Things to check for low mpg

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Doubeleive

Wes
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hell even my beast 6.2l awd get's atleast 10-11 around town and that's riding it heavy at 85-90
 

HACK BLOCK

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im only getting about 180 miles out of a full tank but LTFT are around 18%-20%
 

Scottydoggs

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NYC stop and go driving will kill your mpg easy.

if thats a + ltft you likely got a vac leak somewhere.

if its a neg - number you could have a stuck open injector, check both banks, see if ones richer then the other, then you know its an injector if one side is higher neg #.
 

BlueCollarTahoe

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NYC stop and go driving will kill your mpg easy.

if thats a + ltft you likely got a vac leak somewhere.

if its a neg - number you could have a stuck open injector, check both banks, see if ones richer then the other, then you know its an injector if one side is higher neg #.

yea you aint lying i used to get 12-13 a gallon and it went down to 8. i got the ECU recporgrammed and its going up slowly and the tank lasted longer so far. up to 10 mpg.
 

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